Bentley a



B. A. PLIMPTON.

STRAIN CLAMP FOR ELECTRICAL COND UCTORS. APPLICATI( )N FILED ocT 5. 1920.

1 Patented Feb. 21, 1922.

IN VEN TOR.

I fi ATTORNEY. 7

. UNITED STATES BENTLEY A. rLIMrTON, or LIMA, NEW YORK, ssrenoR OFONE-HAIF To THE Palaceahead npplieationfiled October 5, 1920. Seria1 No. 414,879; I

'turn in a conductor.

iglif te n" c nd l rs, nd t e p pose LAIN INSULATOR CORPORATION, or LIMA,-NEW YORK, A CORPORATION OF NE Y RK, I

vented certain new and useful Improve-r mentslin StrainClamps for Electrical Conductor's, of which the following is a speclfication; 7 V a a My invention relates to clamp ng devices "for electric conductors, and more particularly to 1 strain fclamps, ,such as employed ,where it is necessary to malne a bend or ppli b eespecially t Such clamps fare ofthe inventionis to provide astructure that will grip a conductor on, both sides of ith suflicient pressure to' prevent 'any slippage 1 ;;Anotheiobject 'o'f my improvement T afford a device that will'supporta conductorpan'd revent it from falling, even-though it is" accidentally ,lrel'eiased I the clamping V25 means. a I 1 A further purpose is .to provide a practijcalandsimplef arrangement or parts,- that can be manufactured at an economical figure, andwhich also lends itself readily to quick attachment to a conductor,

" I These and other improvements and advantages will be apparent fro'rnthefollow ing description, in conjunction :with. the accompanying drawings, the novel features being pointed out, in theclaims :at the end of the specification,

Figure 1 is a, side elevation partially in section, illustrating a preferred. embodiment iof my p v m t F'gure 2 is "a seotionalview on line 2-2 of Figure 1,,and

jFigure'Bis a, sectional View on line 3-3 i; g e.,-1. 45 V v of the invention, I haveshown a clamping As an example ofa practical embodiment member consisting of twofclamping portions JA and'B,'arrangedat anangleto each other.

Said clamping member is o'f U shap'ed for- ,mation in cross sectionthroughout both its V clampingportions, I and adapted to receive a conductor at itsfbase between 'the opposite wall s 'C'.j The clamping portions A and B are connectedby' acurved wall I), so that Specification of Letters Patent. Patent d aforementioned clampingv portions on PATENT OFFICE;

sTRAIN CLAMP FOR ELEOTRIOAL CONDUCTORS.

Feb. 21, 1922.

the clamping portions and B, and curved connecting wall D afford a continuous seat for the conductor, which is clamped rigidly,

rate clamping members are provided forengagement with the opposite side of the con- I ductor, one cooperating witheach-of; the

site sides of the curved wall vD.- Said separate clamping members are designated at E, and are each held in lace by a pair Ofretaining devices consisting f of U bo'lts IE, which engage recesses ,Or' grooves in the clamping members and, then passing through openlngs in clamping iportio ns A and B, are heldbynuts G. v

:It is necessary to; retain the conductor very firmly toprevent slipping, and to accomplish this, the several clamping membersaTe provided with cooperating depres- 'sions and projections,which engage the con ductor on opposite sides and are located at the point where 'maximum pressure is exerted; Preferably, the clamping members' E have projections, and the'clamping portions A and Bjhave depressions into "which the conductoris forced. These depressions and projections are arrangedin alinement with the retaining, bolts F, whereby the latterexert a'direct and maximum pressure on the-conductor in :line with the ,projections'and depressions,.this serving to exert a very strong grippmg action. By clamping the conductor on, both sides of the curved wall D, it is drawn tightly against said curved wall which increases the binding action on the conductor, V- a i The clamp, is attached to a suitable stationary support, for which purpose, the opposite walls C are formed with extensions I-I having Openings at their ends to receive a belt I by which the clamping device issecured to the insulator or support. It will be seen that after the main clamping member is attached around a conductor, andthe bolt I secured, theconductor is locked be tween the opposite-walls C, and there, is no possible way for it to getout of the main clamping 'member; even flthoughf should get loose from thejclampingjmembe'rs Thus in the event of an accidental loosening of the clamping members E, the conductor would still be retained by the main clamping member, and cannot fall to the ground. In this way, the extensions H serve as a temporary retaining means in case of accident, until the clamping members can be repaired or tightened.

The invention is not limited to the precise arrangement disclosed, but may be modified without departing from its essential fea tures, and this application isintended to cover any changes that may come within the spirit of the improvement or the scope of the following claims.

I claim: 1

1. A clamping device for electric conductors comprising a clamping member of U- shaped formation in cross section adapted to receive a wire conductor between its opposite walls, and embodying two U-shaped clamping portions arranged at an angle to each other, and means cooperating wlth said clamping portions and acting to secure the conductor thereto.

2. A lamping device-for electric conductorsconiprismg a clamplng member of U- shaped formatlon 1n cross sectlon adapted to lre'ce ve a wire conductor at its base between its opposite walls, said clamping member embodying two U-shaped clamping portions arranged at an angle to each other, and separate clamping members cooperating with each of said clamping portions.

3. A clamping device for electric conductors comprising a clamplng member embodying two clamping portions arranged at an angle to each other and a curved wall connecting said clamping portions, the clamping portions and curved wall affording a'continuousseat for a conductor, and separate clamping members cooperating with each of sa1d clamping portlons and actln'g to secure the conductor therein and agalnst said .curved connecting wall.

' 4. A clamping device for electric conductors comprisinga clamping member of U- shaped formation in cross section and curved longitudinally, aiiording two clamping portions at anangle to each other, the opposite \vallsof the clamping member having extensions, means connecting said extensions for securingthe clamping device to a support, and serving to prevent accidental removal of a conductor positioned between the walls of said clamping member, and separate clampin members cooperating with each of said clamping ortions. I

' 5. A clamping device for electric conductors comprising a clamping member of U- shaped formation in cross section and curved longitudinally to afford clamping portions at an angle to each other, extensions formed on the oppositewalls of the clamping member,

means connectings'aid extensions for securing the clamping devlce to a support, sand connecting means also serving to prevent accidental removal of a conductor positioned between the walls of said clamping member, and separate clamping members cooperating with the angular clamping portions.

6. A clamping device for electric conductors comprising a clamping member embodying two clamping portions arranged at an angle to each other, a curved wall connecting said clamping portions, the clamping portions and curved wall affording a continuous seat for a conductor, a clamping member cooperating with each of the aforesaid clamping portions, and a pair of retaining devices cooperating between each of said clamping portions and the last mentioned clamping members, said clamping portions and clamping members having oooperating projections and depressions in alinement with the retaining devices. 7. A clamping device-for electric conductors comprising a clamping member embodying two U-shaped clamping portions arranged at an angle to each other, separate clamping members cooperating with each of said clamping portions, and a pair of re; taining devices cooperating between each of said clamping members and said clamping portions.

8. A clamping device for electric conducing two U-shaped clamping portions a'r-' ranged at an angle to each other, separate clamping members cooperating with each of said clamping portions, a pair of retaining devices cooperating between each of said clamping members and said clamping por tions, the clamping members and clamping portions having cooperating projections and depressions in alinement with the retaining devices.

9. A clamping device for electric conductors comprising a clamping member of U- shaped formation in cross section and curved longitudinally, affording two U shaped clamping portions at an angle to each other, the opposite walls of the clamping member having extensions, means connecting said extensions for securing the clamping device to a support, said'connecting means also serving'to prevent accidental removal of a conductor positioned between the walls of said clamping member. separate clamping members cooperating with each of said. clamping portions, and a pair of retaining devices cooperating between each of said clamping members and said clamping portions, the clamping portions and clamping members having cooperating depressions and projections in alinement with the retaining devices.

10. A clamping device for electric con ductors comprising a clamping member of U-shaped formation in cross section and curved longitudinally, afiording two clamping portions at an angle to each other, a

curved wall connecting said clamping portions, and clamping devices on opposite sides of said curved wall cooperating with said clamping ortions and acting to hold a conductor tigiitly against said curved wall.

11. A clamping device for electric conductors comprising a clamping member of U shaped formation in cross section and curved longitudinally, affording two clamping portions at an angle to each other, a curved wall connecting said clamping portions, clamping devices on opposite sides of said curved wall cooperating with said clamping ortions and acting to hold a conductor tig tly-against said curved wall, and retaining devices for the clamping members, said clamping p0rtions and clamping members havingcooperating projections and depressions in alinement with the retaining devices.

12. A clamping device-for electric conductors comprising a clamping member of U-shape formation in cross section adapted my name.

BENTLEY A. PLIMPTON'. 

